Aerospace & Defense: Design Tolerance & Analysis Software Practical Usage

It can be really difficult to repair a satellite that’s already in orbit, a weapon that’s in use in the field, or the landing gear on a jet that took off hours ago. The aerospace and defense industry represents one of the biggest sectors that Sigmetrix’ serves. Our CETOL 6σ tolerance analysis and GD&T Advisor products enable some of the industry’s leading companies to expand their precision assembly engineering and design tolerance analysis all the way from early concept design through inspection, providing product development teams the ability to deliver higher-quality and more precisely engineered products.



  • satellite systems
  • landing gear
  • missile systems
  • optics
  • weaponry


APPLICATION – Space & Communications

Objective: World leader in providing fixed satellite services, including transponder leasing for corporate data networks used CETOL 6σ to address design issue with PBB hole position and resulting product defects.

Results: Determined statistical Quality of 0.9s – 105,304 Defects Per Million. CETOL 6σ indicated that holding the hole position to 0.005 would cut the defects per million in half!

APPLICATION – Aerospace Landing Gear

Objective: Improve and address weight requirements for the landing gear without the need for shims.

Results: Engineers working with CETOL 6σ determined that minimal changes would improve design robustness. The analysis accounted for both “free play” and shimmed configurations of the system. Successful pilot project completed in less than 60 days, leading to many additional  analyses for high profile military projects.customer

APPLICATION – Optics Alignment

OPTIC IMAGEObjective: A major challenge faced in this industry segment is impact lens rotation has on optic accuracy. CETOL 6σ was used here to address alignment issues with respect to this rotation.

Results: CETOL 6σ was used to determine the largest design tolerance values that would still achieve the optical cell focal length and center-line error maximum variation requirement.

APPLICATION – Missile Guidance System

Objective: Develop of a new infrared targeting system with both a wide and narrow angle view that were switched as needed to pick up the tracking signal for the missile.

Results: CETOL 6σ analyses resulted in a very robust design allowing the system to achieve performance objectives without unnecessarily tight tolerances on the components of the gimbals, lens mounts, and sensor mount.

  • Better  by developing more functionally-rich products
  • Faster  by reducing product design through manufacturing transition time
  • Reliable  by building higher quality products that last
  • Cheaper  by reducing manufacturing and warranty costs